Cat piss contains ammonia, so it will be hard to shift. The secret weapon is watered-down vinegar. 50/50 will do it, and white vinegar is best. The enzymes in the vinegar will neutralise the odour-producing ammonia in the cat piss. Of course, vinegar has a niff all of it's own, but it's easier to deal with than the stank of a leaking pussy. I can't vouch for what vinegar will do to your wood though.

__________________The man who holds to a belief because of tradition, or hides it because he fears he may be shown to be wrong, does not love the truth but manifests a coward’s faithfulness to his prejudices.

If you took it apart and cleaned it it should be fine. If it got all up in the electronics where you can't/don't want to get to, take it somewhere and ask if they can finish cleaning, it shouldn't cost much if you've taken it mostly apart for them...unless the piss shorted something or something.